[PATCH] erofs-utils: fsck: fix directory loop tracking

[Vansh Choudhary]

Store the current directory nid in the recursion stack.

The loop check compares inode.nid against the entries already on the
stack, so pushing pnid there can miss self-referential directory loops
and report the wrong failure later.

Signed-off-by: Vansh Choudhary <ch at vnsh.in>
---
 fsck/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fsck/main.c b/fsck/main.c
index 16a354f..3530707 100644
--- a/fsck/main.c
+++ b/fsck/main.c
@@ -1022,7 +1022,7 @@ static int erofsfsck_check_inode(erofs_nid_t pnid, erofs_nid_t nid)
 		for (i = 0; i < fsckcfg.dirstack.top; ++i)
 			if (inode.nid == fsckcfg.dirstack.dirs[i])
 				return -ELOOP;
-		fsckcfg.dirstack.dirs[fsckcfg.dirstack.top++] = pnid;
+		fsckcfg.dirstack.dirs[fsckcfg.dirstack.top++] = inode.nid;
 		ret = erofs_iterate_dir(&ctx, true);
 		--fsckcfg.dirstack.top;
 	}
-- 
2.51.0